Portion of a shoe midsole



FIG. 1 is a front perspective view of a portion of a shoe midsole showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is a rear view thereof.

The solid lines immediately adjacent to the shaded area represent claimed boundaries of the design. The uneven broken lines immediately adjacent to the shaded region represents an unclaimed boundary of the design. The uneven broken line showing of inside surfaces of the midsole is for illustrative purposes only and forms no part of the claimed design. The uneven broken line showing of the shoe upper and the remainder of the shoe sole is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe midsole, as shown and described. 